@mcma/aws-dynamodb/dist/lib/dynamo-db-table-description.js

Node module with code for using DynamoDB as the backing data storage for MCMA API handlers and workers.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getTableDescription = getTableDescription;
const client_dynamodb_1 = require("@aws-sdk/client-dynamodb");
const tableDescriptions = {};
function getKeyNames(keySchema) {
    let partitionKeyName;
    let sortKeyName;
    for (const key of keySchema) {
        switch (key.KeyType) {
            case "HASH":
                partitionKeyName = key.AttributeName;
                break;
            case "RANGE":
                sortKeyName = key.AttributeName;
                break;
        }
    }
    return {
        partition: partitionKeyName,
        sort: sortKeyName
    };
}
async function getTableDescription(dynamoDBClient, tableName) {
    if (tableDescriptions[tableName]) {
        return tableDescriptions[tableName];
    }
    const data = await dynamoDBClient.send(new client_dynamodb_1.DescribeTableCommand({ TableName: tableName }));
    const globalSecondaryIndexes = (data.Table.GlobalSecondaryIndexes ?? []).map(i => ({
        name: i.IndexName,
        keyNames: getKeyNames(i.KeySchema)
    }));
    const localSecondaryIndexes = (data.Table.LocalSecondaryIndexes ?? []).map(i => ({
        name: i.IndexName,
        sortKeyName: getKeyNames(i.KeySchema).sort
    }));
    return {
        tableName,
        keyNames: getKeyNames(data.Table.KeySchema),
        localSecondaryIndexes,
        globalSecondaryIndexes
    };
}